Air conditioning apparatus



Oct. 20, 1942. Q s CODY HAL AIR CONDITIONING APPARATUS 3 Sheets-Sheet 3 Filed Feb. 3, 1940 Condenser lNVEN 0R5 05.609 242/1 WITNESSES:

"BY E ZTORNZ Patented ca. 20, 1942 ?ATENT AIR CGNFBITIUNWG APPARATUS Application February 3, 1949, Serial No. 317,094

(Ci. tfi-ltfi) 3 mains.

Our invention relates to air conditioning apparatus, more particularly to a self-contained unit air cooler, such as one that may be mounted in a window of a room to be cooled.

An object of the invention is to provide improved apparatus of the character set forth.

A more particular object is to provide a unit air cooler of simple construction, whereby the same may be manufactured at low cost.

A further object is to provide an air cooler comprising a refrigerating unit and an improved structure for mounting the unit in a Window, a more particular object being to prevent removal of the mounting structure from the window until refrigerating unit been Withdrawn there from.

These and other o ecvs areeffected by our invention as will he a trent from the .iollowing description and claimsiairen in connection with. the accompanying crannies, forming part of thi application, in which:

. g. l is a side elevational view, parig; in sec of our new unit air cooler mounted in clow;

Fig. 2 is a vertical sectional vie-t taken along 3, of the refrigerating removed from .n nting structure;

3 is a plan View the reirigerati e unit;

log. a is a front elevational View or t...e

rigerating unit disnosco the some i; 3. view showinsthe rela ofthe condensate pan. g 6 is a iragm view. in sec tion, showing the rubber]mounting of and,

Fig 7 is a perspec ive oi the combined 5 is an elevaiio of the condense mounted thereon.

Referring to the drawings in detail, our in- "ition comprises a unit air cooler it scented be mounted, as shown in Fig. l, in; the It extends horiation projecting into the tion projecting exteriorly the partition invention, this base member 55 is formed, as shown on the drawings, so as to serve as a condensate drain pan. For this purpose, it is formed with. an upstanding flange I4 extending about the periphery thereof. It is made corrosion-resistant in any suitable manner,

' as by painting the same with an asphalt paint.

The base member thus serves two purposes, namely, to support the entire refrigerating system which cools the air and. also to retain the moisture condensed from the air by the evaporator. Accordingly, the need for a separate drain pan is dispensed with.

An upstanding partition D5 is secured to the base member 63%, as shown particularly in Fig. 7, and forms a division between an evaporator compartment it and a machine compartment ll, formed by the base member is and the mount structure i2. The partition 55 may include portion 5- iorined as a housing for electrical. equipment, such as the capacitor for the corn; pressor motor. As shown in Fig, 2, a gasket 5, of suitable form and suitable material such as ruloher, preferably attached to flanges formed aiong e top and side edges of the partition gasket serves to engage the hereinaftermentioned walls of, the mounting structure i2 and. air seal between the compartments Heat insulating material l is pref is and. erably attached to the partition it to minim me r oi from the nachine compartment il' ions. and is the cvaporaim:

for diving the same, and a fluid-tight casing enclosing both the compressor and the motor. it is disposed in the machine compartment E? and resiliently mounted on the base 03 by means of three resilient mountings 225, which may be of any suitable time known in the art, comprising either sprlngs, rubber. or other resilient means. The condenser 23 may also be of the cross-finned type and is disposed in the machine compartment I! along the bacln it is mounted on the base member I3 in a suitable manner;

for example, end plates or brackets 24 may be provided at its ends and secured to the flange l3 'by screws 25, as shownin Fig. 3.

The refrigerating system further includes parts for connecting the evaporator, the motor compressor unit, and the condenser in a complete refrigerating circuit through which the refrigerant is circulated. Such parts include a capillary tube 21 for conveying condensed refrigerant from the condenser to the evaporator and for reducing the pressure thereof, a suction conduit 28 for conveying the vaporized refrigerant from the evaporator to the motor compressor unit, a separating chamber or reservoir 29 interposed in the suction line 28 to retain any liquid refrigerant leaving the evaporator, thereby preventing its admission to the motor compressor unit, and a discharge conduit 3| for conveying the compressed refrigerant from the motor compressor unit to the condenser. Preferably, the capillary tube 21. and the suction conduit 28 are soldered to each other, as shown particularly in Fig. 3, thereby providing a heat exchanger for transferring heat from the refrigerant in the capillary tube to the refrigerant vapor in the suction conduit 28. The capillary tube and the suction conduit extend through a notch 32 formed in the upper portion of the partition l5.

Propeller fans 33 and 34 are provided for effecting flow of air through the evaporator and the condenser, respectively. They are overhung on the shaft of an electric motor 35 disposed in the machine compartment on the left-hand side of the unit, as shown in Figs. 3 and 4, with the shaft extending horizontally from front to back and with the. front end of the .shaft projecting into the evaporator compartment i6 through an opening 36 in the partition l5. The fan 33 is disposed adjacent the left-hand portion of the evaporator coil and is surrounded by a fan shroud 31 carried by the evaporator coil 2|. The fan 33 is effective to draw air from the room into the evaporator compartment through the right-hand portion of the evaporator and then to discharge the same into the room through the left-hand portion of the evaporator.

The condenser fan 34 is similarly arranged ad- .iacent the left-hand portion of the condenser 23. It is disposed in a fan shroud 38 carried by the condenser 23. The'fan 34 is effective to induce flow of air from outdoors into the machine compartment through the right-hand portion of the condenser 23 and to discharge the air back to outdoors through the left-hand portion of the condenser.

The base member i2 is formed with an opening across a portion of the bottom of the structure l2 to connect the lower edges of the side walls 48; sufficient opening being left, however, to provide flow of air through the opening 4|.

for flow of room air and outdoor air,. respectively.

To fasten it in the window, the mounting structure i2 is provided with a flange 5| adapted to engage the outer edge of the window sill 52 and with clamp members 53 adapted to engage the inner edge of the window sill. Each clamp member 53 is provided with an elongated slot 54, and screws extend through openings in the flanges 50, the slot 54 and through-screwthreaded openings in a block 56. A plurality of washers 51 are provided between the outer end of the clamp member 53 and the flange 50. Thus, by turning the screws 55, the clamp members 53 may be pulled upwardly to clamp the inner edge of the window sill. The slots 54 are elongated to permit adjustment of the clamp members 53 to window sills of different widths. It will be noted from Fig. 1 that the heads of the screws are disposed on the upper or inner side of the flange 50, so that it is not possible to turn the screws from the outside of the mounting structure.

The fastening means for the mo nting structure [2 further includes a flange 8 at the top thereof adapted to engage the inner side of the window sash 59. Clamp members are adapted to engage the outer side of the sash. The lower end of each clamp member is inserted in either 7 one of two openings 61*, formed in a plate 62 spot-welded to the top wall 41, and is of reduced width to form shoulders engaging the upper surface of the plate 62. through and is longitudinally slidable in a slide member 63. A screw 64, whose head is disposed 4|, shown in Fig. 2, disposed in that portion of the base which projects exteriorly of the window opening. A sheet metal conduit member 42 00-- operates with the base member to form a passage 43 extending from the opening 4| to an opening 44 formed in the member 42 and communicating with the evaporator compartment l6. A hinged door 45 is adapted to control the admission of outdoor'air through the opening 44, and is actuated in any suitable manner, as by means of a chain 46 extending to the exterior of the unit. The duct member 42 is also utilized to support the fan motor 35 thereon.

The mounting structure I2, shown in Figs. 1

and 4, comprises a topwall 41 and opposite side walls 48, which are preferably of sheet metal and close the top and sides of both the evaporator compartment [6 and the machine compartment l1. Angle irons 49 extend from the front to the in a recessed portion of the plate 62, as shown in Fig. 1, and engages the lower or inside surface of the plate, is screw-threaded in the slide member 63. The clamp member is formed with a suitable slot to accommodate the screw 64. Since the head of the screw 64 isdisposed interiorly of the mounting structure, the unit I I must be withdrawn to obtain access thereto. By turning the screw 64, the clamp member 60 may be pulled down to clamp the sash 59 between the same and the flange 58.

It will be apparent, therefore, that as long as 64 cannot be had, so that it is impossible to unfasten the mounting structure from the window; To remove the same, it is necessary first to remove the unit I I, thereby eliminating the danger which would accompany unfastening of the mounting structure from the window with the unit disposed therein.

The flanges and the clamp members just described are disposed, as shown in Fig. 1, to hold the mounting structure I2 in such position that the top and bottom thereof, and particularly the flanges 50, slope downwardly toward the exterior. Since the base member l3 rests on the flanges 50, it alsoslopes downwardly toward the exterior or outdoor side of the unit. This arrangement assures that the condensate collected by the evap 5 orator will always flow toward the outside of the The front and back of the structure l2 are open to provide The clamp member extends by means of screws 61.

2,299,527 room, so that'the condensate can never overflow within the room.

Suitable provision may be made for excludin rain water from the room; for example, the flanges and 58 may be provided with suitable gaskets. Any suitable provision may be made, when necessary, for closing the space between the sides of the mounting structure and the window opening.

As a further means of providing quiet operation, the unit H is resiliently mounted on the flanges 50' of the mounting structure. Such resilient mountings comprise blocks of rubber 65 art that it is not so limited, but is susceptible of the-sides of having upper and lowerface plates 66 and are at-- tached to the underside of the base member l3 As shown in Fig. 6, the base member is formed with raised portions 63 forming recesses to receive the resilient mountings. These recesses reduce the height of the unit to the extent of the space that would otherwise exist between the base member and the flanges.

A wood outer cabinet H is preferably provided for the front portion of the air cooler which projects inwardly from the window. It is provided with louvers 12 in the front, as shown in Fig. 1. An air filter I3 is disposed across the front of the evaporator and filters the room air before and after it passes over the evaporator. It also filters the fresh air which is admitted through the passage 43 and discharged'with the room air. This filter may be carried by the wood cabinet, being heldbetween the top wall and the bottom flange thereof as shown in Fig. l. s 4

Operation The refrigerating system operates in the usual manner of such apparatus. Refrigerant vapor is compressed by the motor compressor unit 2| and circulated through the refrigerant circuit- It is condensed in the condenser ,23, its pressure is reduced by the capillary tube 21, and it is vaporized in the evaporator |8, thereby extracting heat from the air circulated over the outer surfaces of the evaporator by the fan 33. I

' The motor 35 is energized to drive the fans 33 and 34. The fan 33 circulates room ,air over the evaporator l8 and the fan 34 circulates outdoor air over the condenser 23, as described above. If the door -45 is open, the fan 33 is also effective to draw outdoor air through the passage 43 and to discharge the same into the room through the left-hand portion of the evaporator 2| and the filter 13.

The evaporator the same to a temperature below the dew-point, thereby condensing moisture from the air. The

' condensed moisture is collected by the base member l3, which serves as a drain pan. The condensate flows to the outer side of the base member through an opening 14, formed below the partition |5 between the raised portion 51 and Y the conduit member. This moisture then col- Hi cools the air flowing over will be seen that we have provided relatively simple unit air cooler havinga compact arrangement of parts.

While we have shown our invention in but one form, it will be obvious to those skilled in the various changes and modifications without departing from the spirit thereof, and we desire, therefore, that only such limitations shall be placed thereupon as are specifically set forth in flange so as to form a condensate pan, an evaporator and an air cooled condenser mounted on the portions of said base member projecting in- ;wardly and outwardly, respectively, said mounting structure being adapted to receive and retain said unit in the window opening, said base member; and the portions of said mounting structure on which the unit is retained sloping downwardly toward the exterior, so that condensate in said pan can never overflow inside the enclosure.

2. A structure for mounting a refrigerating unit in the, window of an enclosure to be air cooled and formed to encompass said unit, said mounting structure including flanges on the top and bottom thereof for engaging the inner side of the window sash and the outer edge of the window sill,-respectively, clamp members on the top and bottom thereof for engaging the outer side of the window sash and the inner edge of the window sill, respectively, and screws extending through the topand bottom from the inside thereof and engaging said clamp members, said. screws having heads onthe interior of the mounting structure and the construction and arrangement of parts such that said unit must be withdrawn from the mounting structure to obtain access tothe heads of said screws for disen-- gaging them from said clamp members.

3. A window-mounted self-contained unit air cooler comprising bottom, top, and vertical walls i forming an enclosure for the unit, means for mounting the unit air cooler in the window of a room, an upstanding partition within the enrator in the air cooling compartment, a coma ment, means for connecting said evaporator, said closuredividing the same into an air cooling compartment and a machine compartment, an evapopressor and a condenser in the machine compartcompressor and said condenser in a complete refrigerant circuit, said bottom wall having an outdoor air inlet therein disposed at least partly on the machine compartment side of the partition, a duct member in the machine compartment providing a passage extending from said inlet 

